After the owner loses his library card, he should immediately report the loss to the library's borrowing office with his valid certificate (so as to avoid the loss of your interests caused by the book being lent out under the guise of others). If the library card is lost and the book is borrowed by others before reporting the loss, I will compensate according to the regulations on lost books. All books that have been lent out before the loss is reported shall be the responsibility of the readers themselves. After the owner reports the loss, he will pay off the loan and overdue fine, and apply for a replacement certificate at the library office with his valid certificate. Readers need 10.00 yuan to reissue the library card, and 20.00 yuan to reissue the card. If you find a library card, cancel it at the loss reporting office.